Test Review
Authored by Brian Greene
Physics
9th - 12th Grade
Used 3+ times
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A bicyclist climbs a hill at a constant speed of 2.5 meters per second (m/s) by applying an average force of 85 Newtons (N). Approximately how much power does the bicyclist develop?
212 Watts
1115 Watts
100 Watts
2450 Watts
Answer explanation
Power can be calculated by Work/time and Force*velocity
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The diagram below shows a 1.0 kilogram (kg) sphere at point A on an incline. The sphere has a potential energy of 5.0 Joules (J) with respect to the base of the incline. What is the potential energy of the sphere when it rolls to point B halfway down the incline?
0
2.5
3
5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A 110 kilogram (kg) bodybuilder and his 55 kilogram (kg) friend run up identical flights of stairs. The bodybuilder reaches the top in 4.0 seconds (s) while his friend takes 2.0 seconds (s). Compared to the power developed by the bodybuilder while running up the stairs, the power developed by his friend is which of the following? (take g as 10m/s2)
twice as much
the same
half as much
four times as much
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A college student has just bought a small computer that weighs 50 Newtons (N). To reach her apartment on the 5th floor, which is 35 meters (m) up, she must climb the stairs. How much work must she do to take her computer up the stairs?
15 joules
50 joules
85 joules
1750 joules
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following graphs best represents the relationship between the power required to raise an elevator and the speed at which the elevator rises?
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The graph represents the relationship between the work done by a student running up a flight of stairs and the time of ascent. What does the slope of the graph represent?
speed
power
impulse
momentum
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following carts has the greatest kinetic energy?
Answer explanation
Calculate kinetic energy with KE=0.5*mass*velocity^2
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